sawtelt



' dnitedtates @sind dlyijiiw.

ZETMANI'AH E. SAWTELLE, OF BOSTON, MASSACHUSETTS, ASSIGNOR To HIMSELT AND THOMASA N. STOWELL, OF SAME PLAOE.

Letters Patent No. 103,783, dated May 3l, 1870.

IMPROVEMENT IN PULLEYS POR WINDOW-SASHv The Schedule referred to in these Letters Patent; and making part of the same.

To all persons to whomrthese presents lmay come Boston, in the county of Suffolk and State o f Massachusetts, have invented a new and useful Improvement in the Manufacture of Window-sash Pulleys; and do hereby declare the saine to be fully described inthe following specification and represented in the accompanying..drawing, of which- Figure 1 isa side elevation;

Fignres 2 and 3, vertical and transverse sections; and

Figure 4, a rear elevation of my improved sashpulley.

Figure 5 is a side view of its glass spindle or pivot.

Such pulleys as usually constructed have either steel or iron pivots or spindles. Those of steel are costly, and, like the iron ones, are liable to become rnsted and to run with much friction.

In'carrying out my invention, I employ a spindle, a, of glass, and make it with a piismat-ic head, b, and l form each of the sideplates, l e, of Vthe roller-case A with sockets fg, to receive the ends of the spindle and project more or less across them.

In the drawing, the roller or slleave is shown at B, as encircling the glass spindle.

The prismatie bead of the spindle and its socket prevent the spindle from revolving with the wheel, and the extension of the sockets down by the ends of the spindle holds the spindle from working endwise or out of place.

The sash-pulley wit-l1 the glass spindle will costless than one with a steel spindle, and is far preferable.

The wheel will run wit-h less friction and wear.

I claim- As a new orv improved manufacture, the-sash-pulley having its spindleof glass and made as described, when the case is formed with sockets to receive the ends of the spindle and project more or less across them, substantially in manner and for the purpose or purposes as explained.

' Z. E. SAWTELLE.

Witnesses:

R. H. EDDY, 'J R. SNOW. 

